122121120111999 has 8 divisors (see below), whose sum is σ = 169907645373312. Its totient is φ = 77874337462680.

The previous prime is 122121120111979. The next prime is 122121120112001. The reversal of 122121120111999 is 999111021121221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 122121120111999 - 2³⁷ = 121983681158527 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 122121120111999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122121120111979) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 884935652917 + ... + 884935653054.

It is an arithmetic number, because the mean of its divisors is an integer number (21238455671664).

Almost surely, 2^{122121120111999} is an apocalyptic number.

122121120111999 is a deficient number, since it is larger than the sum of its proper divisors (47786525261313).

122121120111999 is a wasteful number, since it uses less digits than its factorization.

122121120111999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1769871305997.

The product of its (nonzero) digits is 11664, while the sum is 42.

The spelling of 122121120111999 in words is "one hundred twenty-two trillion, one hundred twenty-one billion, one hundred twenty million, one hundred eleven thousand, nine hundred ninety-nine".